Understanding the key system in music is fundamental to music mastery. This audio-enhanced .PDF guides students through a system of four steps to memorize each of the 15 major keys in the Western musical system in a straight forward and practical manner. Multiple charts and tables illustrate the elements of a key and how they relate to one another. Includes printable Key A Day worksheet, audio reference tracks, and complete table of key spellings. This is the ONLY tool you need to master the key system in music once and for all! Also great for teachers to use as an all-in-one package with students.